Final answer:
The diagnosis 'glutaric aciduria' is not coded to E72.3; this code is reserved for disorders of amino-acid transport and metabolism involving lysine, hydroxylysine, and ornithine.
Step-by-step explanation:
The diagnosis that is not coded to E72.3 is glutaric aciduria. ICD-10 code E72.3 is associated with disorders of amino-acid transport and metabolism, specifically covering conditions related to disorders involving lysine, hydroxylysine, and ornithine. Among the options provided, ornithinemia type 1, hydroxylysinemia, and hyperlysinemia are all related to disorders of lysine and ornithine metabolism and would therefore be coded under E72.3. On the other hand, glutaric aciduria pertains to a different metabolic pathway and would be classified under a separate code. It is essential to use the correct code to ensure accurate clinical documentation and proper medical billing.